Explosion protection enclosure types


Ex d
Flameproof Enclosures
Motors with sliprings & commutators
3 phase squirrel cage motors
Equipment that could ignite an explosive atmosphere housed within a substantial enclosure without transmitting internal explosion to surroundings

Ex e
Increased Safety
3 or 1 phase rotor with cage rotor
Current & voltage transformers
Increased measures taken to prevent generation of arcs, sparks & excessively hot areas in equipment, preventing risk of explosion inside/outside of enclosure

Ex i
Intrinsic Safety
Switches, plugs & socket, terminal boxes
Energy is limited to this equipment in such a way that a spark or a hot surface would not be hot enough to ignite the explosive atmosphere